Specify strong TLS cipher list

* Add list of strong ciphers to use for TLS. Not all are usable in
  Node 0.10.x.
* The secureProtocols options does not allow mandating TLS 1.2 only in
  Node 0.10.x either. But it does prefer 1.2 over 1.1 over 1.0.
* Make including the PAM module optional based on the use_pam config
  file options. Won't crash now if the module didn't install correctly.
* Change test cert generation script to 2048-bit keys

Change-Id: I8f73f657a7a24ea63a43fd348a55a539c12afadd
Added volume create support to CLI

Note changes in package.json to use custom pkgcloud as well as new
config for vm/volume creation

Change-Id: Ic6727ff8a9de209d538a8d2abec2378a38092f69